Answer 1

\(R_{tđ}=\dfrac{R_1\cdot R_2}{R_1+R_2}=\dfrac{15\cdot60}{15+60}=12\Omega\)

\(\rightarrow I=\dfrac{U}{R_{tđ}}=\dfrac{6}{12}=0,5A\)

\(\rightarrow\left\{{}\begin{matrix}I_1=\dfrac{U}{R_1}=0,4A\\I_2=\dfrac{U}{R_2}=0,1A\end{matrix}\right.\)